



function makeArrow(fn)
{
   var sprite;
    new THREE.TextureLoader().load('img/timg.png', function (texture) {
        var spriteMaterial = new THREE.SpriteMaterial(
            { map: texture, useScreenCoordinates: false} );
        sprite = new THREE.Sprite( spriteMaterial );
        sprite.scale.set(50,50,1);
        fn(sprite);
      
    });
   
}



